lab08 - The Physics of Light & Sound...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The Physics of Light & Sound Introduction In this experiment you will measure several sound levels and will investigate how they can be added together. The sound level is related to the intensity of the sound, which is proportional to the energy of the sound wave. Keep in mind that the human perception of sound strength (loudness) is different than the sound level. Formulae Intensity, I , is deFned as power per unit area: I = Power Area = P A (1) The SI unit for intensity is W/m 2 . Because audible sounds range in intensity from 10-12 W/m 2 to 1 W/ m 2 (several orders of magnitude) it is more convenient to use a logarithmic scale for measuring sound levels. This scale is called the decibel scale and the sound intensity level (SIL) is deFned as: SIL =10Log I I (2) where I = 10-12 W/m 2 . Equipment/Materials: or this experiment you will need a sound level meter and different sources of sound. The sound level meter has a microphone, an internal ampliFer, and a meter. There are 3 switches you will need to use:meter has a microphone, an internal ampliFer, and a meter....
View Full Document

Page1 / 3

lab08 - The Physics of Light & Sound...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online